Home / 21,511.16-29,685.77-11,951.91

Finding the Fourth Proportional to 21,511.16, 29,685.77 and 11,951.91

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Solution

The fourth proportional to 21,511.16, 29,685.77 and 11,951.91 is: 16,493.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.16 : 29,685.77 = 11,951.91 : x
  2. Step 2: Convert to fraction form
    21,511.16/29,685.77 = 11,951.91/x
  3. Step 3: Cross multiply
    21,511.16x = 29,685.77 × 11,951.91
  4. Step 4: Simplify right side
    21,511.16x = 354,801,591.56
  5. Step 5: Solve for x
    x = 354,801,591.56/21,511.16
  6. Step 6: Final answer
    x = 16,493.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.